Yes it is. I think the triple-deckers are always wood frame, although a number of them have asbestos shingles on the outside. The major variations include being 3 units, like ours, or a "double-bow" which has two units on each floor.
The part that sticks out on the side can have different shapes, as well. I found an online photo of the first place we rented: notice how the "tower" part to the side is like a half-hexagon, with straight walls.
In our current home (can't find a good real estate site photo), that part is round, like the silos of my childhood in the US Midwest! So, the front portion of our front room is curved. Nice for letting light in, but a bit challenging for arranging furniture inside! Fortunately, the low bookcases built by The Beloved (my husband) for our first flat fit into the curved spaces, so it's quite cozy.
no subject
The part that sticks out on the side can have different shapes, as well. I found an online photo of the first place we rented: notice how the "tower" part to the side is like a half-hexagon, with straight walls.
http://www.zillow.com/homedetails/17-Victoria-St-UNIT-1-Dorchester-MA-02125/63710358_zpid/
In our current home (can't find a good real estate site photo), that part is round, like the silos of my childhood in the US Midwest! So, the front portion of our front room is curved. Nice for letting light in, but a bit challenging for arranging furniture inside! Fortunately, the low bookcases built by The Beloved (my husband) for our first flat fit into the curved spaces, so it's quite cozy.